The United Nations is reportedly beginning an investigation into claims that Pfc. Bradley Manning is being “tortured.” Manning was arrested in May, after allegedly leaking over 250,000 classified diplomatic cables to the whistleblowing website WikiLeaks.

Last week, it was announced that supporters for Manning lodged a complaint with the Office of The United Nations High Commissioner for Human Rights in Geneva, Switzerland, saying that the conditions of his cell and the treatment he is receiving, amount to “torture.” According to Salon, Manning is not allowed to exercise, is denied bed sheets and pillows, and has been held in solitary confinement for 23 hours of every day since his arrest. According to Manning’s attorney, David Coombs, a former United States Army major, and veteran of the Iraq War, Manning is only allowed to walk in a small room for exercise.

“[Manning is] taken to an empty room and only allowed to walk, normally just walks figure eights in the room. If he indicates that he no long feels like walking, he is immediately returned to his cell,” stated Coombs to Salon.

The Pentagon denies that Manning is being tortured, saying he is being treated “fairly. We’ve been reviewed … No concerns have been voiced from a (Department of Defense) perspective.”